The Sunday Times talks to Mr Rayner Loi, 26, co-founder and chief executive of Lumitics, a local technology start-up that developed Insight, a smart food waste tracker. The device is used by hotels, airlines and large commercial kitchens to trace how much and what type of food is thrown away so that they can take steps to reduce waste.

A: I was at a buffet line when I noticed the staff serving up trays of freshly prepared food 20 minutes before it closed. I was puzzled. Why were they preparing fresh food minutes before closing? It hit me that the hotels and buffet restaurants are probably the ones contributing quite a bit to Singapore's food waste problem.